Dillingham Field on Oahu is working anytime the trade winds blow. I have flown everytime I have been on Oahu and only once did I have to wait two days for the winds to be favorable. It is beautiful. However,you are not going to get any cross-country miles in. The ridge is it. For me it is good for two days out of a week with some diving, surfing, sailing, hiking, sleeping, or eating in the days between flights.